CVE-2026-7783: Perfex CRM SQL Injection Vulnerability

CVE-2026-7783 Overview

CVE-2026-7783 is a SQL injection vulnerability in CodeCanyon Perfex CRM versions up to 3.4.1. The flaw resides in the AbstractKanban::applySortQuery function within application/services/AbstractKanban.php, part of the Admin Kanban Endpoint. Attackers manipulate input passed to this function to inject arbitrary SQL into backend queries. The vulnerability is exploitable remotely by authenticated users with low privileges, and a public exploit has been published.

Critical Impact

Authenticated remote attackers can inject SQL statements through the Admin Kanban Endpoint, exposing CRM data including customer records, invoices, and credentials stored in the application database.

Affected Products

• CodeCanyon Perfex CRM versions up to and including 3.4.1
• application/services/AbstractKanban.php component
• Admin Kanban Endpoint functionality

Discovery Timeline

• 2026-05-05 - CVE-2026-7783 published to NVD
• 2026-05-05 - Last updated in NVD database

Technical Details for CVE-2026-7783

Vulnerability Analysis

The vulnerability is a blind SQL injection [CWE-74] affecting the Kanban board sorting functionality in Perfex CRM. The applySortQuery method in AbstractKanban.php accepts user-supplied input and concatenates it into a SQL query without adequate sanitization or parameterization. Because the query executes server-side against the application database, an attacker can alter query logic to extract data through boolean or time-based inference techniques.

The issue affects the administrative Kanban interface, which means an attacker requires valid authenticated access. Exploitation does not require user interaction beyond submitting a crafted sort parameter to the endpoint.

Root Cause

The root cause is improper neutralization of special elements used in a SQL command. The applySortQuery function trusts caller-controlled input for the column or direction parameter and embeds it directly into the executed query string. Without prepared statements or strict allow-list validation, attacker-supplied SQL fragments become part of the executed statement.

Attack Vector

The attack vector is network-based and requires low privileges. An authenticated attacker submits a crafted request to the Admin Kanban Endpoint with a manipulated sort argument. The injected SQL executes within the database context used by the application. Refer to the Bytium blind SQL injection writeup for technical proof-of-concept details and to the VulDB entry #360980 for additional metadata.

Detection Methods for CVE-2026-7783

Indicators of Compromise

• HTTP requests to administrative Kanban endpoints containing SQL keywords such as SLEEP, BENCHMARK, UNION, SELECT, or boolean payloads like AND 1=1 in sort parameters
• Unexpected query latency or repeated time-based delays in MySQL slow query logs originating from Kanban handlers
• High-volume administrative session activity from a single source iterating through sort parameter values

Detection Strategies

• Inspect web server access logs for requests targeting Kanban routes with non-alphanumeric characters in sort, order, or column parameters
• Enable MySQL general query logs and search for malformed ORDER BY clauses or unexpected subqueries originating from the CRM application user
• Deploy a web application firewall rule set covering OWASP CRS SQL injection signatures, with logging enabled for the /admin path

Monitoring Recommendations

• Alert on authenticated CRM sessions issuing repeated requests to the Kanban endpoint with varying parameter payloads
• Monitor for database errors emitted by the PHP application that reference syntax errors near user-controlled values
• Track outbound data volume from the CRM database server for signs of bulk extraction following suspicious request patterns

How to Mitigate CVE-2026-7783

Immediate Actions Required

• Restrict access to the Perfex CRM administrative interface to trusted IP ranges via reverse proxy or firewall rules
• Audit administrative accounts and revoke unused or shared credentials that could be leveraged for authenticated exploitation
• Deploy a web application firewall with SQL injection signatures in front of the CRM application

Patch Information

No vendor patch is referenced in the published advisory at the time of CVE assignment. Operators should monitor the CodeCanyon Perfex CRM product page for updates beyond version 3.4.1 and apply any security release as soon as it becomes available. Consult the VulDB submission #807743 for tracking updates.

Workarounds

• Apply allow-list validation on sort and column parameters at a reverse proxy or WAF layer, permitting only known-good column names
• Disable or restrict the Kanban feature for non-essential administrative roles until a vendor fix is released
• Enforce least-privilege database accounts for the CRM, removing unnecessary FILE, EXECUTE, or cross-schema permissions to limit injection impact

# Example ModSecurity rule to block suspicious sort parameters on Kanban endpoint
SecRule REQUEST_URI "@contains /admin/kanban" \
    "chain,phase:2,deny,status:403,id:1007783,msg:'Possible CVE-2026-7783 SQLi attempt'"
    SecRule ARGS:sort|ARGS:order "@rx (?i)(union|select|sleep|benchmark|--|/\*)" \
        "t:none,t:urlDecodeUni"